Good Morning, good guesses KennyP is right on and since I don't have a PK tool bar I'll have to fabricate my own. so I'm looking for some 1.75" square tubing, the teeth are Danish tines used on different cultivators and you can install different types of shovels points the tines. I going to build it 60" wide with 2 bars and stagger the tines.

Very similar to a field implement we used called a spring toothed harrow. Much like a very light cultivator, 32' wide, lifted with hydraulics on its own frame instead of dragging behind a field cultivator like diamond or flexible harrows did. It was a really handy field tool to use on light land first thing in the spring to get the weeds going.

Hi oldedeeres, yea and here in the Midwest / at least MN they were called multi weeders came in about 25 / 30 yrs ago then they fell out of favor as they tend to bring rocks to the surface very well so many have been dissembled and these teeth are laying around. Forgot I took some more pics, kind of laid things put to figure out how wide to build the digger here's a couple of ideas: